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STDBUF(1)		FreeBSD	General	Commands Manual		     STDBUF(1)

NAME
     stdbuf -- change standard streams initial buffering

SYNOPSIS
     stdbuf [-e	bufdef]	[-i bufdef] [-o	bufdef]	[command [...]]

DESCRIPTION
     stdbuf is used to change the initial buffering of standard	input, stan-
     dard output and/or	standard error streams for command.  It	relies on
     libstdbuf(3) which	is loaded and configured by stdbuf through environment
     variables.

     The options are as	follows:

     -e	bufdef
	     Set initial buffering of the standard error stream	for command as
	     defined by	bufdef (see BUFFER DEFINITION).

     -i	bufdef
	     Set initial buffering of the standard input stream	for command as
	     defined by	bufdef (see BUFFER DEFINITION).

     -o	bufdef
	     Set initial buffering of the standard output stream for command
	     as	defined	by bufdef (see BUFFER DEFINITION).

BUFFER DEFINITION
     Buffer definition is the same as in libstdbuf(3):

	   "0"	 unbuffered

	   "L"	 line buffered

	   "B"	 fully buffered	with the default buffer	size

	   size	 fully buffered	with a buffer of size bytes (suffixes 'k', 'M'
		 and 'G' are accepted)

EXAMPLES
     In	the following example, the stdout stream of the	awk(1) command will be
     fully buffered by default because it does not refer to a terminal.
     stdbuf is used to force it	to be line-buffered so vmstat(8)'s output will
     not stall until the full buffer fills.

	   # vmstat 1 |	stdbuf -o L awk	'$2 > 1	|| $3 >	1' | cat -n

SEE ALSO
     libstdbuf(3), setvbuf(3)

HISTORY
     The stdbuf	utility	first appeared in FreeBSD 8.4.

AUTHORS
     The original idea of the stdbuf command comes from	Padraig	Brady who
     implemented it in the GNU coreutils.  Jeremie Le Hen implemented it on
     FreeBSD.

FreeBSD	10.1			April 28, 2012			  FreeBSD 10.1

NAME | SYNOPSIS | DESCRIPTION | BUFFER DEFINITION | EXAMPLES | SEE ALSO | HISTORY | AUTHORS

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